Shikaku

Shikaku (also known as Rectangles) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. You have to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Click and drag to draw a rectangle. To remove lines use the right mouse button or hold the Ctrl or the Shift key.

Video Tutorial

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This Month
1.	coolcoolguy65	00:04.14
2.	qobi	00:06.99
3.	gh	00:07.87
4.	Truth-or-Peace	00:07.98
5.	venipede	00:08.22
6.	GeorgPfleger	00:08.93
7.	msimon27	00:09.04
8.	Sloiw	00:10.14
9.	fenshen625	00:10.66
10.	NOHJIWAN	00:10.70
11.	zebramachine	00:10.73
12.	Dchair	00:12.58
13.	Oryn	00:12.75
14.	Dorice	00:14.84
15.	MarkSnail	00:16.61
16.	Koakuma	00:17.57
17.	ggzzmm01	00:17.94
18.	chube	00:17.97
19.	SWICT	00:18.15
20.	viysid	00:18.39

This Week
1.	Sloiw	00:10.14
2.	gh	00:10.79
3.	GeorgPfleger	00:11.87
4.	Dchair	00:12.58
5.	Dorice	00:15.26
6.	Koakuma	00:17.66
7.	aeunchae	00:20.63
8.	Picccccci	00:21.84
9.	CLAVDIVS	00:30.33
10.	dg4444	00:32.51
11.	--- empty ---	--:--
12.	--- empty ---	--:--
13.	--- empty ---	--:--
14.	--- empty ---	--:--
15.	--- empty ---	--:--
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

Today
1.	Dchair	00:12.58
2.	--- empty ---	--:--
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
8.	--- empty ---	--:--
9.	--- empty ---	--:--
10.	--- empty ---	--:--
11.	--- empty ---	--:--
12.	--- empty ---	--:--
13.	--- empty ---	--:--
14.	--- empty ---	--:--
15.	--- empty ---	--:--
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

MO3
1.	zahhydude1	00:03.48
2.	vowels	00:03.81
3.	demian2	00:04.66
4.	Vicellen	00:04.70
5.	coolcoolguy65	00:05.06
6.	BingBongBob	00:05.15
7.	JZE	00:05.16
8.	numbrr	00:05.20
9.	nabi	00:05.27
10.	mtanzer	00:05.34

AO5
1.	zahhydude1	00:03.76
2.	vowels	00:03.88
3.	demian2	00:04.92
4.	Vicellen	00:05.06
5.	numbrr	00:05.32
6.	BingBongBob	00:05.39
7.	nabi	00:05.41
8.	bearn	00:05.55
9.	JZE	00:05.75
10.	coolcoolguy65	00:06.01

AO12
1.	zahhydude1	00:04.54
2.	vowels	00:04.91
3.	BingBongBob	00:05.84
4.	Vicellen	00:06.24
5.	numbrr	00:06.26
6.	demian2	00:06.31
7.	JZE	00:06.39
8.	bearn	00:06.41
9.	coolcoolguy65	00:06.66
10.	nabi	00:06.91

Robots / programmatic solvers		info
1.	tlstyer	00:00.006
2.	Charlie Li	00:00.207
3.	Paul Bismuth	00:01.692

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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2025-10-21 06:13:15

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